Now the remote /home/john/ is mounted in /tmp/httpfs/, head there to
browse the remote files.

Unmount the filesystem:

fusermount -u /tmp/httpfs/

Prepare the environment

Make sure the current user is in the fuse group, this preliminary step is
mandatory to use any FUSE filesystem. You can list the groups you belong to with
groups, if that includes fuse you're done, otherwise: